RELATIONSHIP BETWEEN THE PECZELY'S LARGE-SCALE WEATHER TYPES AND AIR POLLUTION LEVELS IN SZEGED, SOUTHERN HUNGARY

摘要

This paper determines the 13 Peczely's large-scale weather situations over the Carpathian Basin with the levels of the main air pollutants for the winter and summer months. Based on the ECMWF data set, daily sea-level pressure fields analysed at 00 UTC were prepared for each Peczely-type in order to relate their sea-level pressure patterns to the levels of air pollutants in Szeged. The database comprises daily values of 12 meteorological and 8 pollutant parameters for the period 1997-2001. Concentration of air pollutants occured exclusively during anticyclonic conditions, or anticyclone-ridge situations. Their dispersion can be experienced not only during cyclonic, but also anticyclone-ridge weather types. CO, SO_2 and TSP were sensitive to Peczely's weather classification, while NO_2/NO, O_3 and O_(3max) were completely insensitive. After all, anticyclonic weather types are determinant in winter, while their role in classifying concentrations of the air pollutants is less predominant during summer.